Wi-Fi security isn't very secure at all, but if your access point is more secure than others, evil-doing crackers are more likely to move on. In the spirit of "best of what's offered" security, most wireless access points are set to use WEP encryption to password their connections, but WPA (supported on most modern routers and computers) is less easy to crack than WEP. To switch to WPA, on your access point's administration page, change the security level and set your WPA passphrase to something long and difficult to crack.
NOTE: For surfing Internet with ALFA-AWUS050NH on Ubuntu Jaunty with rt2870sta driver, you must use the Kernel "2.6.28-11-generic #42-Ubuntu", without change or updates the drivers modules. NOTE: The tutorial is not related to Ubuntu karmic. Driver RTL8187/Stacks-mac80211 (ref. ALFA-AWUS036h) - These drivers, for surfing Internet, are more stable than r8187, and fully compatible with Network-Manager 0.7 installed by default on Ubuntu 9.04. Network-Manager 0.7 installed by default on Ubuntu 9.04. - Supports all encryption without problems. (OPEN, WEP and WPA/WPA2) - With Compat-Wireless, the "injection" working, but for support “Fragmentation attack” (opt. -5) you need to install one patch. - The RX sensitivity and packets injection is less, related to drivers r8187. Driver r8187/Stacks-ieee80211 (ref. ALFA-AWUS036h) - This driver is recommended for use with the Suite of Aircrack-ng, but not particularly suitable for Internet connections, as less stable and disc...